JP5045497B2 - Electric drive - Google Patents

Description

  The present invention relates to an electric drive device having a mechanism for supplying oil to lubrication and cooling points.

  Conventionally, a rotary unit and a shaft connected to the rotary member are housed in a case and an oil reservoir provided below the case is scraped up by the rotary member to supply oil to a lubrication point. Lubricating devices are known.

As an example of the lubrication device as described above, even if the rotating member is rotating at a low speed and the amount of oil scraping is small, the case can be supplied with a sufficient amount of oil quickly and quickly. A boss that surrounds one end of the shaft is formed on the side surface, and an oil reservoir portion that has an upper opening is formed in the case-side empty portion that is surrounded by the boss and the shaft, and the oil reservoir portion is communicated with a location that requires lubrication. There is known a lubrication device in which a device and a guide rib or a dropping rib are provided in a case (see, for example, Patent Document 1).
JP 2001-173762 A

  However, in the drive unit lubrication device according to the prior art, since the opening for introducing oil into the oil reservoir portion is formed by cutting out a part of the boss, the notch greatly increases the rigidity of the shaft support portion of the boss. There was a problem of lowering.

  In addition, since the oil reservoir section is not provided with a structure for blocking oil in the axial direction of the shaft, most of the oil recovered using the ribs may spill before being supplied to the oil reservoir section. There was also a problem that the oil was not collected efficiently.

The electric drive device of the present invention includes a rotor, a rotor shaft that supports the rotor, and a stator accommodated in a case, and a first oil reservoir, a second oil reservoir in the case, The rotor shaft is rotatably supported using a bearing boss provided in the case, and has a supply oil passage for supplying the oil to a lubrication location and a cooling location, and the first oil The reservoir is provided in a lower portion of the case, and the second oil reservoir is at least partially located between one end of the rotor shaft and the case and communicates with the supply oil path, The oil stored in the first oil storage unit is scraped up by the rotation of the rotor, and at least a part of the scraped oil is removed from the lubrication point and the oil via the second oil storage unit and the supply oil passage. cooling And a third oil reservoir is provided on the outer peripheral edge of the bearing boss of the rotor shaft on the upper side of the case from the second oil reservoir. A three oil reservoir is communicated with the second oil reservoir via a communication oil passage, and a rotation detector for detecting rotation of the rotor is further accommodated in the case, and the rotation detection The container includes a stator and a rotor, and a part of the third oil reservoir is formed by a part of a side surface of the stator .

  According to the electric drive device of the present invention, the second oil reservoir is connected to the outer peripheral edge of the bearing boss of the rotor shaft on the upper side of the case with the second oil reservoir via the communication oil passage. Since the three oil storage portion is provided, it is not necessary to provide a notch serving as an opening in the rotor bearing boss, and the support rigidity of the rotor shaft can be ensured. In addition, since the communication oil passage corresponds to the above-described opening of the prior art, it is not necessary to provide an opening in the second oil reservoir, and oil collected in the axial direction of the shaft can be prevented from spilling. Furthermore, since the wall portion of the third oil storage portion having a sufficiently large area with respect to the communication oil passage can be used as the oil recovery surface, the amount of oil recovered in the second oil storage portion can be increased. In addition, since the recovered oil can also be temporarily stored in the third oil storage section, the third oil storage section is buffered even if unevenness occurs in the amount of oil scraped up due to fluctuations in the rotational speed of the rotor. The oil recovered by fulfilling the role of can be stably supplied to the second oil reservoir.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of a first embodiment of the electric drive device according to the present invention, and FIGS. 2 (a) and 2 (b) show a second oil reservoir of the electric drive device of the first embodiment. It is explanatory drawing explaining the structure around a part and a 3rd oil storage part, and a front view which shows the shape of a stator. FIG. 3 is a cross-sectional view of a second embodiment of the electric drive device according to the present invention, and FIGS. 4 (a) and 4 (b) show the second oil reservoir and the electric drive device of the second embodiment. It is explanatory drawing explaining the structure of a 3rd oil storage part periphery, and a front view which shows the shape of a stator. FIG. 5 is a cross-sectional view of a third embodiment of the electric drive device according to the present invention, and FIG. 6 shows the vicinity of the second oil storage portion and the third oil storage portion of the electric drive device of the third embodiment. It is explanatory drawing explaining a structure. FIG. 7 is a cross-sectional view of a fourth embodiment of the electric drive device according to the present invention, and FIG. 8 shows the vicinity of the second oil storage portion and the third oil storage portion of the electric drive device of the fourth embodiment. It is explanatory drawing explaining the structure.

  As shown in FIG. 1, the electric drive device 1 according to the first embodiment of the present invention includes a rotor 6 in a case 2 formed by fixing a first case 3 and a second case 4 with bolts 5; The rotor shaft 7, the stator 8, the oil 9, the first oil reservoir 10, the second oil reservoir 11, and the third oil reservoir 12 are provided.

  For example, the electric drive device 1 has a plurality of magnet coils 13 wound around the stator 8 and supplies an alternating current to the magnet coil 13 to generate a rotating magnetic field in the stator 8 to drive the rotor 6. It is the drive device used. Then, the rotation obtained by driving the rotor 6 is transmitted from the rotor shaft 7 to the output shaft 15 via the speed reducer 14 and is output to the outside of the case 2.

  Here, the rotor shaft 7 passes through the approximate center inside the case 2, and the bearing bosses 3 a provided on the first case 3 and the second case 4 via the first rotor bearing 16 and the second rotor bearing 17, respectively. 4a is rotatably supported. A sun gear 18 that is an input member to the speed reducer 14 is formed at the tip of the rotor shaft 7. A coupling portion 19 that extends outward in the radial direction of the rotor shaft 7 and couples the rotor 6 and the rotor shaft 7 is provided at substantially the center in the longitudinal direction of the rotor shaft 7. Further, inside the rotor shaft 7, there are provided lubricating oil passages 20 as supply oil passages for supplying the oil 9 to the respective portions (bearings, gears, etc.) in the case 2 through the center of the rotor shaft 7. ing.

  The rotor 6 has a cylindrical shape and is attached to the rotor shaft 7 via the coupling portion 19 described above. In addition, the width of the coupling portion 19 is made smaller than the width of the rotor 6 so as to have as much space as possible inside the rotor 6 in the radial direction. In the inner space of the rotor 6, the rotation detector 23 including the stator 21 and the rotor 22 and the outer periphery of the bearing boss 3 a that supports the first rotor bearing 16 are formed upward. A part of the third oil reservoir 12 is installed so as to overlap the rotor 6 in the axial direction of the rotor shaft 7.

  The stator 8 has a cylindrical shape and is installed so that the inner peripheral surface of the stator 8 and the outer peripheral surface of the rotor 6 have a minute gap. Further, the stator 8 is configured to receive a reaction force of the driving force generated in the rotor 6 by fixing the outer peripheral portion to the second case 4.

  The reduction gear 14 meshes with an internal gear 24 fixed to the second case 4, a carrier that also serves as the output shaft 15, the sun gear 18 formed at the tip of the rotor shaft 7, and the internal gear 24 and the sun gear 18. It consists of a pinion gear 26 that revolves while rotating within the internal gear 24. With such a configuration, the speed reducer 14 can reduce the rotation of the rotor 6 transmitted through the sun gear 18 provided on the rotor shaft 7 to an appropriate rotational speed and output it from the output shaft 15.

  The first oil reservoir 10 is provided in the lower part in the case 2. And the oil 9 is stored in the 1st oil storage part 10 to the level which a part of rotor 6 immerses.

  The second oil reservoir 11 is formed by an oil guide 27 attached to one end of the rotor shaft 7 on the side opposite to the output shaft 15 side, and the wall surface of the first case 3, and the first oil reservoir 10 It is provided above.

  As shown in FIGS. 2A and 2B, the third oil storage unit 12 includes an attachment surface of the stator 21 of the rotation detector 23 (the fitting portion 3 b that holds the outer periphery of the stator 21 and the stator 21. A part of the side surface holding portion 3 c) that holds the side surfaces of the rotor shaft 7 is formed by scraping inward in the axial direction of the rotor shaft 7, and is provided above the second oil storage portion 11. In other words, the third oil reservoir 12 is formed by the wall surface of the first case 3 and a part of the side wall of the donut-shaped stator 21. In addition, guide ribs 28 are formed on both sides of the scraped portions of the mounting surfaces 3b and 3c for the stator 21 for the purpose of collecting oil. The third oil reservoir 12 and the second oil reservoir 11 are communicated with each other through a communication oil passage 29 so that oil can be supplied from the third oil reservoir 12 to the second oil reservoir 11. ing. Note that the volume of the third oil reservoir 12 is larger than the volume of the second oil reservoir 11.

  With this configuration, in the electric drive device 1 according to the first embodiment of the present invention, when the rotor 6 is rotated by energizing the magnet coil 13, the rotation is stored in the first oil reservoir 10 by the rotation. The oil 9 is scraped up by the rotor 6 to the upper part in the case 2. The oil splashed to the first case 3 side by the rotation of the rotor 6 and a part of the oil dripped from the inner peripheral surface of the rotor 6 and the stator 8 on the first case 3 side are temporarily stored in the third oil reservoir. 12 will be collected. Here, the third oil reservoir 12 is formed with the lower surface and the three side surfaces being the wall surface of the first case 3, and the remaining one surface is the side surface of the stator 21 of the rotation detector 23. can do. The oil 9 collected in the third oil reservoir 12 is supplied to the second oil reservoir 11 formed by the oil guide 27 and the wall surface of the first case 3 through the communication oil passage 29. The oil 9 stored in the second oil storage portion 11 flows into the lubricating oil passages 20 provided in the rotor shaft 7 through the supply holes 30, and into the portions in the case 2 that require lubrication and cooling. Supplied.

  Therefore, according to the electric drive device 1, since it is not necessary to provide a notch in the rotor bearing boss 3 a, not only can the rotor shaft support rigidity be ensured, but the oil recovery area 29 is sufficiently large. By providing the third oil reservoir 12, the amount of oil recovered in the second oil reservoir 11 can be increased. In addition, by temporarily storing oil in the third oil storage unit 12, even if the amount of oil scraped up due to fluctuations in the rotational speed of the rotor 6 is uneven, the third oil storage unit 12 serves as a buffer. Oil can be stably supplied to the second oil reservoir 11. Furthermore, since the volume of the 3rd oil storage part 12 is larger than the volume of the 2nd oil storage part 11, the supply of the oil to the 2nd oil storage part 11 can be performed reliably and stably.

  Moreover, since the side surface of the stator 21 of the rotation detector 23 is used as a part of the side wall that constitutes the third oil storage part 12, there is no need to separately provide the side wall of the third oil storage part 12, and the component parts The oil spill amount from the third oil reservoir 12 can be greatly reduced without increasing the score. In addition, since a relatively large oil collecting surface can be secured without requiring additional parts and space, oil can be reliably collected even when the rotational speed of the rotor 6 is low. it can.

  Further, since the third oil storage portion 12 is formed by cutting out part of the attachment surfaces 3b, 3c for the stator 21 of the rotation detector 23, the case 2 of a normal casting part that can be divided into molds is formed. The third oil storage portion 12 can be formed only by combining the side surfaces of the stator 21 of the rotation detector 23, and the manufacturing cost can be reduced in addition to the reduction in the number of components.

  FIG. 3 shows an electric drive device 31 according to a second embodiment of the present invention. As shown in FIG. 3 and FIGS. 4A and 4B, the electric drive device 31 of the present embodiment has the mounting surfaces 3 b and 3 c for the stator 32 of the rotation detector 23 in the axial direction of the rotor shaft 7. The inner ribs are partially cut away, and the contact ribs 33 on both sides of the cut-out portions are extended upward to form guide ribs 28, and the shape of the stator 32 of the rotation detector 23 is different. However, although different from the first embodiment, it is configured in the same manner as the first embodiment in other respects.

  Here, as shown in FIGS. 4A and 4B, the shape of the stator 32 of the rotation detector 23 in the present embodiment is a shape in which a fan-shaped protrusion 32a is superimposed on an upper portion of a donut shape. is doing. In the fan-shaped protrusion 32a, the inclination of the inclined portions on both sides is an angle corresponding to the extended contact surfaces 33 on both sides of the cutout portion.

  By adopting such a configuration, in the electric drive device 31 of the second embodiment of the present invention, in addition to the same effects as described in the first embodiment, the depth of the third oil storage portion 12 is obtained. Can be increased by the protrusion 32a, and the amount of oil stored in the third oil storage unit 12 can be increased. Furthermore, since the dimension in the depth direction of the third oil reservoir 12 is large, even if the electric drive device 31 of the present embodiment is applied to a non-stationary transmission device such as an automobile, for example, the inclination of the device Therefore, it is possible to prevent the problem that all the oil is spilled from the third oil storage unit 12.

  FIG. 5 shows an electric drive device 41 according to a third embodiment of the present invention. As shown in FIG. 5 and FIG. 6, the electric drive device 41 of the present embodiment is configured so that the second oil storage portion 11 is connected to each part lubricating oil path 20 with each part lubricating oil path 20 provided inside the rotor shaft 7 as a boundary. The upper second oil reservoir 42 above 20 and the lower second oil reservoir 43 below the lubricating oil passage 20 are divided into the oil guide 27 and the first case at the lower second oil reservoir 43. 3 is different from the first embodiment in that the volume of the lower second oil reservoir 43 is reduced by shortening the distance between the wall surface 3 and the first wall in other respects. It is configured.

  With this configuration, in the electric drive device 41 according to the third embodiment of the present invention, in addition to the same effects as described in the first embodiment, the volume of the lower second oil storage portion 43 is increased. Since the lower second oil reservoir 43 is filled with a small amount of oil, the amount of oil supplied from the third oil reservoir 12 to the second oil reservoir 11 when starting the electric drive device 41 is small. However, the lower second oil reservoir 43 can be filled in a relatively short time. As a result, the time until the oil is supplied to the respective lubricating oil passages 20 can be shortened, and problems such as the part requiring lubrication and cooling continuing to rotate without lubrication can be solved. Such a configuration is particularly effective when traveling on a congested road when used as a vehicle unit, for example.

  FIG. 7 shows an electric drive device 51 according to a fourth embodiment of the present invention. As shown in FIGS. 7 and 8, the electric drive device 51 of the present embodiment is provided with a space 52 on the inner side (inner peripheral side) in the radial direction of the rotor 6, and the rotation detector 23 in the space 52. In addition, a separate fourth oil reservoir 53 is installed at a position where a part of the third oil reservoir 12 is disposed and at a position away from the rotor 6 toward the first case 3 in the axial direction of the rotor shaft 7. In addition, an oil dripping hole 54 is provided in the fourth oil reservoir 53 so that the oil 9 can be supplied dropwise from the fourth oil reservoir 53 onto the third oil reservoir 12 or the communication oil passage 20. Unlike the third embodiment, the second embodiment is configured in the same manner as the third embodiment.

  By adopting such a configuration, the electric drive device 51 of the fourth embodiment of the present invention is provided on the inner peripheral side of the rotor 6 in addition to the same effects as described in the third embodiment. Since the rotation detector 23 and a part of the third oil storage unit 12 are disposed in the space 52, even when the rotation of the rotor 6 is low, it drops from the inner periphery of the rotor 6 and the inner periphery of the stator 8. The oil to be dropped can be reliably dropped onto the third oil reservoir 12. In addition, the fourth oil reservoir 53 that can increase the area of the recovery surface by expanding to the inner diameter of the stator 8 and the oil recovery efficiency can be improved even when the rotation of the rotor 6 is low. By combining with the third oil reservoir 12 that can be produced, the oil recovery efficiency can be improved over almost the entire rotation range of the rotor 6, thereby allowing the inside of the apparatus even if the oil amount (oil level) of the first oil reservoir 10 is low. Can be sufficiently lubricated, the oil level of the first oil reservoir 10 can be reduced, and the stirring resistance of the rotor rotation can be greatly reduced.

  In addition to the above-described embodiments, the electric drive device of the present invention may further include a plurality of oil storage portions, and a storage portion may be provided on the second case side to supply oil to each lubricating oil passage. May be supplied.

  Thus, according to the electric drive device of the present invention, the second oil reservoir is communicated with the outer peripheral edge of the bearing boss of the rotor shaft via the second oil reservoir via the communication oil passage. In addition, since the third oil storage portion is provided, it is not necessary to provide a notch serving as an opening in the rotor bearing boss, and the support rigidity of the rotor shaft can be ensured. In addition, since the communication oil passage corresponds to the above-described opening of the prior art, it is not necessary to provide an opening in the second oil reservoir, and oil collected in the axial direction of the shaft can be prevented from spilling. Furthermore, since the wall portion of the third oil storage portion having a sufficiently large area with respect to the communication oil passage can be used as the oil recovery surface, the amount of oil recovered in the second oil storage portion can be increased. In addition, since the recovered oil can also be temporarily stored in the third oil storage section, the third oil storage section is buffered even if unevenness occurs in the amount of oil scraped up due to fluctuations in the rotational speed of the rotor. The oil recovered by fulfilling the role of can be stably supplied to the second oil reservoir.

  In the electric drive device of the present invention, the case further includes a rotation detector for detecting the rotation of the rotor, and the rotation detector includes a stator and a rotor, and includes a third oil storage unit. May be formed by a part of the side surface of the stator. With such a configuration, the side wall of the third oil reservoir can be closed without increasing the number of components, and the amount of oil spilling from the third oil reservoir can be greatly reduced. In addition, it is possible to secure a relatively large oil collecting surface without requiring additional parts and space, and the second oil storage section can reliably ensure that the oil scooped up by the rotor is low even when the rotational speed of the rotor is low. It becomes possible to supply to.

  Furthermore, in the electric drive device of the present invention in which a part of the third oil reservoir is formed as a part of the side surface of the stator as described above, the outer periphery of the stator is held in a part of the case. And a side holding part that holds the side face of the stator are formed, and the third oil storage part is located within a predetermined range of a part of the fitting part and a part of the side holding part. You may form by providing a notch recessed part in an inner peripheral direction in a peripheral part. With such a configuration, the third oil reservoir can be formed simply by combining the side surface of the rotation detector with a cast part shape that can be divided into ordinary parts, thereby reducing the number of parts and reducing the manufacturing cost. Can be planned.

  Furthermore, in the electric drive device of the present invention in which a part of the third oil reservoir is formed as a part of the side surface of the stator as described above, the outer periphery of the stator is held in a part of the case. And a side holding part that holds the side face of the stator are formed, and the third oil storage part is located within a predetermined range of a part of the fitting part and a part of the side holding part. It is formed by providing a notch recess in the inner peripheral direction at the peripheral edge and providing a guide rib by projecting a part of the outer periphery of the stator outward in the radial direction of the rotor shaft in accordance with the notch recess. Also good. With such a configuration, the depth of the third oil reservoir can be increased, and the amount of oil stored in the third oil reservoir can be increased. Furthermore, since the dimension in the depth direction of the third oil reservoir is large, oil capture to the third oil reservoir is ensured even when the electric drive device is inclined, and the oil supply to each part is stable. Therefore, it can be used as a non-stationary electric drive device.

  Furthermore, in the electric drive device according to the present invention, a space is provided on the inner peripheral side of the rotor, and a part of the rotation detector and the third oil reservoir is protruded in the axial direction of the rotor shaft in the space. You may do it. With such a configuration, it is possible to increase the probability that the oil scooped up by the rotor will drip into the third oil reservoir, and increase the oil recovery efficiency to the third oil reservoir even when the rotor rotates at a low speed. be able to.

  Furthermore, in the electric drive device according to the present invention, the volume of the second oil reservoir is larger than the volume of the portion below the horizontal center line of the rotor shaft, and the volume of the portion above the horizontal center line of the rotor shaft. It may be configured. With such a configuration, since the second oil reservoir below the horizontal center line of the rotor shaft is filled with a small amount of oil, the time until the oil is supplied to the lubricating oil passage can be shortened. At the same time, it is possible to eliminate problems such as that the portion requiring lubrication and cooling keeps rotating without lubrication.

  Furthermore, in the electric drive device of the present invention, the volume of the third oil reservoir may be larger than the volume of the second oil reservoir. With such a configuration, the oil supply from the third oil reservoir to the second oil reservoir can be reliably and stably performed.

  In the electric drive device according to the present invention, a fourth oil reservoir is further provided in the case, and the fourth oil reservoir is provided outside the rotor in the axial direction and above the third oil reservoir. And oil supply means for supplying oil from the fourth oil reservoir to the third oil reservoir or the communication oil passage. With such a configuration, the oil recovery efficiency can be improved, and the device can be sufficiently lubricated even if the oil amount (oil level) of the first oil reservoir is low. It is possible to operate in a state where the oil level is lowered and the stirring resistance of the rotor rotation is low.

It is sectional drawing which shows the cross section of the electric drive device of 1st Example of this invention. FIG. 2A is an explanatory view for explaining the configuration of the second oil storage portion and the third oil storage portion of the electric drive device of the first embodiment, and FIG. 2B is the electric type of the first embodiment. It is a front view which shows the shape of the stator of a drive device. It is sectional drawing which shows the cross section of the electric drive device of 2nd Example of this invention. FIG. 4A is an explanatory diagram for explaining the configuration of the second oil storage section and the third oil storage section of the electric drive unit of the second embodiment, and FIG. 4B is the electric drive system of the second embodiment. It is a front view which shows the shape of the stator of a drive device. It is sectional drawing which shows the cross section of the electric drive device of 3rd Example of this invention. It is explanatory drawing explaining the structure of the 2nd oil storage part of the electric drive device of 3rd Example, and a 3rd oil storage part. It is sectional drawing which shows the cross section of the electric drive device of 4th Example of this invention. It is explanatory drawing explaining the structure of the 2nd oil storage part of the electric drive device of 4th Example, a 3rd oil storage part, and a 4th oil storage part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric drive device 2 Case 3 1st case 4 2nd case 5 Bolt 6 Rotor 7 Rotor shaft 8 Stator 9 Oil 10 1st oil storage part 11 2nd oil storage part 12 3rd oil storage part 13 Magnet coil 14 Reduction gear 15 Output shaft (carrier)
16 1st rotor bearing 17 2nd rotor bearing 18 Sun gear 19 Coupling part 20 Each part lubricating oil path 21 Stator 22 Rotor 23 Rotation detector 24 Internal gear 25 Engagement internal gear 26 Pinion gear 27 Oil guide 28 Guide rib 29 Communication oil path 30 Supply hole 31 Electric drive device 32 Stator 33 Contact surface 41 Electric drive device 42 Upper second oil reservoir 43 Lower second oil reservoir 51 Electric drive device 52 Space 53 Fourth oil reservoir 54 Oil dripping hole

Claims (7)

A rotor, a rotor shaft that supports the rotor, and a stator are housed and provided in a case, and a first oil reservoir and a second oil reservoir are provided in the case.
The rotor shaft is rotatably supported using a bearing boss provided in the case, and has a supply oil passage that supplies the oil to a lubrication point and a cooling point.
The first oil reservoir is provided at a lower portion of the case,
The second oil reservoir is located at least partially between one end of the rotor shaft and the case and communicates with the supply oil passage;
The oil stored in the first oil storage unit is scraped up by the rotation of the rotor, and at least a part of the scraped oil is removed from the lubrication point and the oil via the second oil storage unit and the supply oil passage. An electric drive device for supplying to a cooling point,
A third oil reservoir is provided on the outer peripheral edge of the bearing boss of the rotor shaft on the upper side of the case with respect to the second oil reservoir, and the third oil reservoir is connected to the second oil reservoir. In addition to being communicated through a communication oil passage ,
The case further houses a rotation detector for detecting the rotation of the rotor,
The rotation detector includes a stator and a rotor,
The electric drive device in which a part of the third oil storage part is formed by a part of a side surface of the stator . The electric drive device according to claim 1 ,
In a part of the case, a fitting portion that holds an outer periphery of the stator and a side surface holding portion that holds a side surface of the stator are formed.
The third oil storage part is formed by providing a notch in the outer peripheral edge part of the bearing boss in the inner peripheral direction in a predetermined range of a part of the fitting part and a part of the side surface holding part. Electric drive device. The electric drive device according to claim 1 ,
In a part of the case, a fitting portion that holds an outer periphery of the stator and a side surface holding portion that holds a side surface of the stator are formed.
The third oil reservoir is provided with a notch in the outer peripheral edge of the bearing boss in a predetermined range of a part of the fitting part and a part of the side surface holding part, and the notch An electric drive device formed by providing a guide rib by projecting a part of the outer periphery of the stator toward the radially outward direction of the rotor shaft in accordance with the recess. The electric drive device according to claim 1 ,
A space is provided on the inner peripheral side of the rotor,
An electric drive device in which the rotation detector and a part of the third oil storage portion are arranged to protrude in the axial direction of the rotor shaft in the space. The electric drive device according to claim 1,
The electric drive device in which the second oil reservoir is configured such that the volume of the portion above the horizontal center line of the rotor shaft is larger than the volume of the portion below the horizontal center line of the rotor shaft. . The electric drive device according to claim 1,
The electric drive device in which the volume of the third oil reservoir is larger than the volume of the second oil reservoir. In the electric drive device according to claim 1 or 2 ,
A fourth oil reservoir in the case;
The fourth oil reservoir is provided on the outer side in the axial direction of the rotor and above the third oil reservoir, and from the fourth oil reservoir to the third oil reservoir or the communication oil passage. An electric drive device comprising oil supply means for supplying oil.

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